Duplicating machine



ec. 15, 1936. A. MARCHEV v DUPLICATING MACHINE 5 Sheets-Sheet 1 Filed Oct. 14, 1935 j? Me 7750 2 JZfreaCA ar a/zez/f 'Dec. l5, 1936. A. MARCHEV DUPLICATING MACHINE Filed Oct. 14, 1935 3 ShG'QtS -SI'ISB'I'. 2

Dec. 15, 1936. MARCH 2,064,071

DUPLICATING MACHINE Filed Oct. 14, 1935 5 Sheets-Sheet 5 Patented Dec. 15, 1936 UNITED ST'EES DUPLICATENG MACHINE Alfred Marchev, La Grange, Iii assignor to Ditto, incorporated, Chicago, 111., a corporation of West Virginia Application October 14, 1935, Serial No. 44,923

6 Claims.

This invention relates to duplicating machines and is particularly adaptable to machines for system work such for example as that shown in the application of John W. Hernlund, Alfred Marchev, and Robert F. Morrison, Serial No.

713,590, filed March 1, 1934, for Duplicators. I

Machines of the type disclosed in the above identified application are adapted to duplicate sales data, cost data, and other statistics on forms which may or may not be of the same size. Quite often in this type of work a relatively small number of duplicate copies are made, but it is necessary to give only a part of the full information contained upon the master sheet to one department while another part of the information on the master sheet may be given to another department. In providing the information in this form, the operator may have all of the information on the master sheet, and then in making copies it is desirable to block out that part of the information which is of no value or should not be furnished to the particular department for which the copies are being made The improvement contemplated in the present application is one which facilitates the accomplishment of this blocking out process directly on the duplicating machine. In the application of copy work to machines of this character, the master sheet may be shortened so that only a portion of the drum is covered by the short master sheet. Now in duplicating from this short portion full size copy sheets may be used which are somewhat longer than the master sheet applied to the gelatin band.

By means of the present invention, the operator may readily apply a blank sheet to cover that portion of the drum which is not covered by the short master sheet and thus prevent anything on the gelatin band covering said portion from being transferred to the copy sheet.

The objects and features of the invention will be more apparent from the following description reference being had to the accompanying drawings in which Fig. 1 is a side view partly in section showing the invention as applied to a. duplicating ma,- chine of this system rotary type;

Fig. 2 is a fragmentary view of a portion of the structure in Fig. 1 showing a changed position;

Fig. 3 is a plan view of that portion of a duplicating machine to which the present invention is applied;

Fig. 4 is a sectional view on the line 44- of Fig.3;

In accordance with the disclosure in the aforementioned application, the side frames l2 and I3 carry sheet metal guards I4 and [5, respectively, 1 which extend inwardly over the ends of the drum ID.

The mechanism for rotating'the drum ID has not been illustrated as any suitable drive mechanism may be utilized for this purpose.

The drum i0 is provided with a duplicating band l6 (see Fig. 5) which may be the usual gelatin band employed in machines of this character. .Sheets are fed to the drum l0 through a paper chute indicated generally by the numeral ll. A paper feed table is shown at I8, and a vertical paper guide is shown at l9. Sheets are stripped from the drum by a stripping mechanism indicated generally by the numeral 20 (see Figs. 1 and 3). This stripping mechanism comprises a pair of stripping rolls 2| and 22 carried upon an auxiliary frame having side frame members 23 and 24 towhich a pair of end brackets 25 and 26 are secured. A receiving tray is shown partly at 21, this tray being of the usual construction. A cross bar 28 carries a pair of paper guides 29 and 30 for guiding sheets of paper stripped from the drum by the rollers 2| and 22 over the tray 21. A stripper bar 3| is shown in Fig. 3, this stripper bar being, of course, substantially the same as that shown in the prior application above referred to.

The brackets 25 and 26 have upwardly projecting arms 32 and 33 to which a block-out sheet feeding device 34 is secured. This feeding device has a frame consisting of sides 35 and 36, a cover portion 31, and an end portion 38, these portions being preferably formed integral with each other by being stamped out of sheet metal. The side portions 35 and 36'have arms 39 and projecting therefrom and pivoted to the upwardly projecting arms 32 and. 33 of theend brackets 25 and 26. Small angle iron stops 4| and 42 are secured to the top ends of the members 32 and 33 to provide a resting place for the feeding device 55 34 when it is lifted into the position shown in full lines in Fig. 2.

The feeding device 34 has a shaft 43 journalled in the sides 35 and 36 thereof. The shaft 43 has fixed thereon exteriorly of the sides 35 and 36 a pair of arms 44 and 45 which arms at their free ends support a shaft 46 of a platen roller 4?; Also fixed to the shaft 43 there is provided a spring pressed arm 48 (see Fig. 7) which arm at its free end has a stud 49 to receive a spring 50. Spring 5!] at its upper end fits over a stud 5| mounted in the cover 31 of the feeding device 34. The spring 50 is under compression so as to normallytend to rotate shaft 43 in a clockwise direction as shown in Fig. '7 which will press the platen roller 4'! downwardly toward the drum I0. A stop plate 58 (see Fig. 6) is riveted to the end portion 38 of the housing 34 and has a portion 59 projectingbeneath the bearing for shaft 46 in the arm 44 so as to operate as a stop to limit the downward movement of arm 44 with respect to the housing.

The side portions 35 and 36 have slots 52 and 53 respectively for receiving theshaft 46 of the roller 41 so that this roller can be moved up and down within the housing of the feed device 34. A guide plate 54 is mounted within the feed device 34 and secured to the side portions 35 and '36 as for example by being Welded thereto. The function of this guide plate is, of course, to guide block-out sheets such as 55 to the platen roller 41. The guide plate 54 has a guard or finishing strip 56 applied thereto. This strip consists of a nickel plated thin sheet metal strip folded over into U- shape and fastened down upon the plate 54 by suitable screw bolts indicated at 5'! in Figs. 3, 4, and 5.

When the feeding device 34 is not in use, it is folded up into the position shown in full lines in Fig. 2. When the device is to be used, however, it is brought down into the dotted line position shown in Fig. 2 where a pin 60 which is fixed to one side 35 thereof engages an upstanding block 6| upon a sliding latch member 62which is mounted upon the guard plate 15 of the main frame of the machine. The latch member 62 has a sliding movement on the guard plate l5 being slidably mounted thereon by means of a pair of screw bolts 63 and 64 which screw bolts have collars 65 and 66 thereon slidable in a slot 6'! provided in the guard plate l5. A nut 68 and a washer 69 secure the collar 56 in position, the washer 69 being adapted to ride. upon the under surface of the guard plate 15. A similar washer TI] is provided on the screw bolt 63 to hold the collar 65 in place, but the bolt 63 extends upwardly into the block 6| in which it is screw threaded. The block 6| has a slot H therein which slot is adapted to receive the pin 60 when the latch device 62 is moved from the position shown in Fig. 2 to that shown in Fig. 1.

When the mechanism is in the position shown in Fig. 1, the block-out device 34 is moved down into operative position with respect to the drum. However, it is not in position to cause contact of theplaten roller 41 with the gelatin band IS on the drum as this contact is controlled by a cam and roller mechanism consisting of a cam .12 fixed to the end of the drum H), for example, by.

suitable screws such as T3 and a roller I4 which roller is carried by an arm 15 fixed to the shaft 43 by a hub 15 (see Fig. 3 and Fig. 4). The cam 72 normally holds the platen roller 41 raised above the duplicating surface on the drum by engagement with the roller 14. However, on that portion of the drum which would be left uncovered by a short master sheet, the cam 12 is discontinued leaving an open space between ends 15 and H of the cam 12 as illustrated most clearly in Fig. 4. The end 11 of the cam 72 does not terminate as abruptly as the end .16 thereof, but is turned inwardly toward the axis of the drum so as to gradually lift the roller '14 as the drum is rotated to bring the end 17 beneath the roller 14.

The operation of the device is substantially as follows: Assuming that the operator has applied a short master sheet to the gelatin band IS on the drum and that he desires to feed a block-out sheet 55 onto the gelatin band to cover that portion which would otherwise be exposed and engage copy sheets of greater length than the master sheet as the copy sheets are fed to the drum, the operator feeds the desired block-out sheet 55 onto the guide plate 54 into position to engage the platen roller 47. The platen roller 41 is made of the usual rubber employed for this purpose. It is understood,'of course, that in order to use the feeding device 34 the operator must bring it into the position shown in Fig. 1.

Now when the drum rotates, the roller 14 will drop off the end 16 of the cam 12 thus allowing the platen roller 4'! to press the block-out sheet 55, which has been fed underneath it, down against the surface of the gelatin band and thus feed the block-out sheet onto the portion of the gelatin band it is desired to cover. The cam 12 is so constructed and applied to the drum in order to release the b1ock-out feeding device at the proper position. To fit different sizes of blockout requirements, the cam 12 may be modified as desired so that it is possible to cover any particular portion of the gelatin band with the blockout sheet. When the block-out sheet is applied, copies are then made in the regular fashion with the block-out sheet left in place so as to prevent the copy sheets from being printed with any material that might be on that part of the band beneath the block-out sheet.

Thus it is possible to use the short master sheets in such a fashion as to substantially cover all of the band without the necessity of leaving wide unused spaces on the band and without any danger of picking up upon the copy sheet any imprints from that part of the band not covered by the short master sheet.

While one embodiment of the invention has been shown and described, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims in which it is the intention to claim all novelty inherent in the invention as broadly as possible in view of the prior art.

The invention having thus been described,

' what is claimed as new and desired to be secured by Letters Patent is:

1. A duplicating machine comprising a frame, an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to direct sheets to said drum, stripping means to remove sheets from said drum, and an auxiliary sheet feed device having means to supply a blockout sheet to a portion of the duplicating band on said drum said device including means to press the block-out sheet into intimate contact with said band as the block-out sheet is supplied.

2. A duplicating machine comprising a frame, an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to 75 direct sheets to said drum, stripping means to remove sheets from said drum, and an auxiliary sheet feed device having means to supply a blockout sheet to a portion of the duplicating band on said drum, said auxiliary device comprising a frame movable toward and away from said drum, a platen roller carried by said last named frame, and a sheet guide for directing sheets between the drum and said roller.

3. A duplicating machine comprising a frame, an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to direct sheets to said drum, stripping means to remove sheets from said drum, and an auxiliary sheet feed device having means to supply a blockout sheet to a portion of the duplicating band on said drum, said auxiliary device comprising a second frame pivoted on the machine and a platen roller in said second frame.

4. A duplicating machine comprising a frame, an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to direct sheets to said drum, stripping means to remove sheets from said drum, and an auxiliary sheet feed device having means to supply a blockout sheet to a portion of the duplicating band on said drum, said auxiliary device comprising a frame movable toward and away from said drum, a platen roller carried by said last named frame, and a sheet guide for directing sheets between the drum and said roller, said last named frame having arms movably supporting the platen roller and a spring pressing the roller toward the drum.

5. A duplicating machine comprising a frame,

an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to direct sheets to said drum, stripping means to respect to said second frame, spring means press- 7 ing said shaft supporting means in one direction, and means on the drum opposing movement of said supporting means by said spring during a portion of the rotation of the drum.

6. A duplicating machine comprising a frame, an impression drum journalled therein, a duplicating band on said drum, a copy sheet guide to direct sheets to said drum, stripping means to remove sheets from said drum, and an auxiliary sheet feed device having means to supply a blockout sheet to a portion of the duplicating band on said drum, said auxiliary device comprising a second frame pivoted on the machine and a platen roller in said second frame, a shaft for said roller, shaft supporting means movable with respect to said second frame, spring means pressing said shaft supporting means in one'direction, means on the drum opposing movement of said supporting means by said spring during a portion of the rotation of the drurn, and stop means on said second frame limiting movement of said. supporting means by said spring.

ALFRED MARCHEV. 

